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Ultra Hardness Aircraft Aluminum Sheet Metal Alloy 7xxx Series 7050 O T H Temper
Quick details:
| Aluminum grade | 7050 (2xxx, 5xxx, 6xxx, 7xxx series available) |
| Temper | T7451 (other temper: O H T available) |
| Length | ≤38000mm |
| Width | 200mm – 4300mm |
| Thickness | 6mm – 260mm |
| Surface | Degreased, anodized, mill finish,laminating,etc |
| Common alloy | 7050, 7075, 7475, 7175,7150, 7055 and etc. |
| Application | Aerospace, marine, automotive, railway transportation, oil and chemical industries etc. |
Details of 7xxx series alloy applied on the aerospace:
Aluminum alloy is used as aircraft material at early time. In the
1960s-1970s, 7xxx alloys often used T73 and T76 heat treatment
system. But now, alloy 7050 and high purity alloy are often used.
7075 aluminum sheet belongs to the ultra-hard aluminum of Al - zinc
- Mg – Cu. In the end of 1940s, alloy 7075 has been applied to
aircraft manufacturing industry and is still widely used in
aviation industry as deforming aluminum alloy of super high
idensity. Its characteristic is that after solid solution
treatment, the plasticity is remarkable and after heat treatment,
the reinforcement effect is very obvious. Besides, if under 150 ℃,
alloy 7075 has high intensity and the low temperature intensity is
especially outstanding. However, it also has few shortages, like
poor welding performance as well as the tendency of stress
corrosion and cracking. The protective measures of covering a piece
of aluminum on the surface and other schemes are essential to be
taken. Two-stage aging can improve the ability of alloy to resist
stress corrosion and cracking. Under the condition of annealing and
quenching, the plasticity of 7050 is slightly inferior to the same
state of 2A12 and is slightly superior to that of 7A04. The stress
corrosion performance of alloy 7075 is better than that of 7A04 and
among them, alloy 7075 T651 is top grade, which is honored as the
most excellent products in aluminum alloy. The high intensity of
7075 is far more than mild steel. Most importantly, this alloy has
good mechanical properties and anodizing reaction. It is a typical
aircraft aluminum.
Characteristics of Aircraft Aluminum Sheet 7050:
7075- 0
Un-heat-treated 7075 (7075-0 temper) has maximum tensile strength
no more than 280 MPa (40,000 psi), and maximum yield strength no
more than 140 MPa (21,000 psi).
The material has an elongation (stretch before ultimate failure) of 9–10%. 7075-0 is highly corrosion-resistant combined with generally acceptable strength profile.
| Chemical Composition % of 7050 Aircraft Aluminum Sheet | |||||||||||
| Alloy No. | Si | Fe | Cu | Mn | Mg | Cr | Zr | Ti | Zn | Others | Al |
| 7050 | 0.12 | 0.15 | 2.0-2.6 | 0.1 | 1.9-2.6 | 0.04 | 0.08-0.15 | 0.06 | 5.7-6.7 | 0.02 | Remainder |
Regular alloies of 7xxx series and application:
| Grade | Alloy | Temper | Parts of application |
7xxx | 7050 | O,T6,T651,T7451 | Stringer, wallboard of the undercarriage, cabin door frame, outer barrel, up supporting poles, anti-twisting arm, connecting rod, upper skin of aerospace vehicle, inner part of back wing, the main supporting joints, frame of passenger sightseeing window, strengthening frames wing beams, edge strip of keel beam , ventral sheet of keel beam, floor twist beam.
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| 7075 | O,T6,T651 | ||
| 7A04 | T6,T651 | ||
| 7A09 | T6,T651 |
Typical features of alloy 7xxx series:
1.Ultra-hard aluminum
2. Super high idensity
3. High intensity and the low temperature intensity
4. Able to resist stress corrosion and cracking
5. Good mechanical properties and anodizing reaction
6. Remarkable plasticity and obvious reinforcement effect
